Improvement in grain-drills



UNITED STATES GEORGE A. PURSLY, OF PITT'sEIELD, ILLINOIS.

IMPROVEMENT IN GRAIN-DRILLS Specification forming part of Letters PatentNo. 139,610, dated J une 3, 1873; application filed March 8, 1873.

To all whom it may concern:

Be it known that I, GEORGE A. PURSLY, of Pittsfield, in the county ofPike and State of Illinois, have invented. a new and useful Improvementin Grain-Drill, of which the following is a specification:

the force with which the dukes or seed-tubes are pressed into the earth.The invention consists in the combination of the movable bar and itsguide-rods and springs with the frame, draft-rods, and flukes; and inthe combination of the pivoted and slotted plates, the pivotedconnecting-bar, and the lever, with the movable bar, the guide-rods andsprings, the draftrods, the flukes, and the frame, as hereinafter fullydescribed.

A represents the frame of the machine. B are the flukes, which aresuspended from the rear part of the frame A, and the draft-strain uponwhich is sustained by the rods 0, the forward ends of which are pivotedto a crossbar A. With each of the draft-rods G is connected the lowerend of a guide-rod, D, which passes up through a hole in abeam or bar,E, which moves up and down upon guide-rods F attached to the side barsof the frame A, and which pass through holes in the ends of the said barE. The bar is held up by springsG coiled around the rods'F. H aresprings coiled around the rods D, the upper ends of which bear againstthe lower side of the bar E, and their lower ends bear against thedraft-rods C.

By this arrangement the downward move- U, and thus hold the flukes Bdown to their work with a yielding pressure, so that the said dukes maybe held down with a greater or less pressure by moving the bar E down orup. I are triangular plates, which are pivot-ed, at their angles, to theside bars of the frame A, or to supports attached to said sidebars. Inthe plates I are formed curved eccentric or cam slots to receive pinsattached to the bar E, so that the said bar E may bedrawn down by movingthe said plates Iupon their pivots. The plates I are connected andcaused to move together by a bar, J, the ends of which are pivoted tothe said plates. To one of the plates I is rigidlyattached aflever, K,which a passes up along the side of the bar E, and

through a slot in a plate, L,attached to the y upper side of the saidbar E. In the plate L,

at the side of the slot, is formed a number of notches to receive thelever K to lock the bar 11] in any position into which it may be ad'-jiisted.

' Having thus described my invention, I

claim as new and desire to secure by Letters Patent I The combination ofthe pivoted and slotted plates I, pivoted connectingbar J, and lever K,with the bar E, guide-rods D and F, springs H and G, draftrods 0, flukesB, and frames A, substantially as herein shown and described.

GEORGE A. PURSLY.

Witnesses: l

JOHN Bar, THOMAS GRAY.

